Everything in its place. That's the first thing you'll notice about the Scent Blocker® S3® Tactical 7-button Shirt. Everything is exactly where it should be. From the chest pockets specially-designed for better accessibility, to the elastic loops on the right sleeve to hold your grunt tube or wind checker. There's no doubt who Scent Blocker had in mind when they created the S3 Tactical 7-button Shirt.